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Piston and ring set.

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Shaun Wallace

03-22-2014 19:49:32

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I have 6 new in box pistons with p/n 4396648 on box. Instruction sheet says eng mod 16 - 25000. Have had for several years and have wondered what they fit. If have value or scrap.

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03-23-2014 05:25:25

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 Re: Piston and ring set. in reply to Shaun Wallace, 03-22-2014 19:49:32  
If they are 5.25 in dia, they are for a 6 cyl 844 ci engine which existed in several forms from 16000 to 25000 series used in HD16 and larger vehicles.

I"d call an equipment service shop and see if they can place the part number - newer part number system may have added digits in front of your number - maybe starting with 7 plus your number.

In good condition they should be saleable - either on some of the construction equipment sites or on eBay.

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03-24-2014 16:14:30

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 Re: Piston and ring set. in reply to ACEd, 03-23-2014 05:25:25  
I agree with Ed.. The 25000 was an 844 inch AC engine back in the 1960-1985 era. Construction used a lot of them in 945 wheel loaders, 260 size scrapers, etc. The 21000 series was turbo unit (HD 16- 21), the 25000 was turbo and aftercooler... probably 375 HP.. Those should be high quality pistons if made for the 25000.... BIG straight 6.

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03-24-2014 16:22:37

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 Re: Piston and ring set. in reply to steve(ill), 03-24-2014 16:14:30  
Add a 7 in front and then search 74396648 maybe with Allis or Fiat-Allis in front. Should still be a lot of those machines out there that use these.

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Lonnie Smith

03-22-2014 20:23:59

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 Re: Piston and ring set. in reply to Shaun Wallace, 03-22-2014 19:49:32  
I think the 25000 is the engine type/model but it's way too new for me know anything about.

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